To use our DreamHost nameservers for your .farm TLD, you'll need to navigate to Domains > New TLDs > Manage > My Domains > brookfield.farm
Click on your domain, and you'll see a "DNS Servers" tab under Settings. Click "DNS Servers", and on that page, click to use "Custom DNS" . You'll see Enom's nameservers (dns1.name-services.com, etc) there. Delete all of those, and replace them with our nameservers: ns1.dreamhost.com, ns2.dreamhost.com, ns3.dreamhost.com
Save your changes, and you'll be using our nameservers!
The reason your domain was using Enom's nameservers is due to the fact that when you register a new TLD from our panel, you're actually registering the domain through Enom, since that's their page in our panel and they maintain it. Eventually we're going to move all new TLDs to be maintained by us, but we don't have an ETA on that yet.
As far as setting up email for brookfield.farm, you would do it like you would for any of your other domains. Hosting can be done just like any other domain. Just set it up on the 'Manage Domains' page first, then create an email address via "Manage Email" if you want to use our mail services.
Hope that helps!